Urea-triazone N characteristics and uses

Area of Science:

• Agricultural Chemistry
• Soil Science
• Plant Nutrition

Background:

• Nitrogen (N) fertilizers are crucial for plant growth but are susceptible to losses through volatilization and leaching.
• Urea is a common N source, but its rapid hydrolysis can lead to significant N losses.
• Developing stable N sources with reduced environmental impact and improved plant uptake is essential.

Purpose of the Study:

• To characterize urea-triazone as a stable, slow-release nitrogen source.
• To evaluate the comparative N loss pathways (ammonia volatilization, nitrate leaching) of urea-triazone versus urea.
• To assess the efficacy of urea-triazone for direct foliar application on plant growth.

Main Methods:

• Urea-triazone was synthesized from urea, formaldehyde, and ammonia.
• Mineralization rates were compared to urea in Munjor sandy loam.
• Ammonia volatilization was measured from Cecil sandy loam.
• Nitrate leaching was assessed using Yolo loam columns.
• Tomato plants were treated with urea-triazone, ammonium nitrate, or urea via foliar application.

Main Results:

• Urea-triazone exhibited a mineralization rate of 66% of urea.
• Ammonia volatilization losses were 41% lower than urea.
• Nitrogen leaching losses were two-thirds that of urea or nitrate.
• Foliar application of urea-triazone enhanced tomato growth compared to ammonium nitrate and urea.

Conclusions:

• Urea-triazone is a stable nitrogen source with reduced ammonia volatilization and nitrate leaching potential.
• Its slow-release properties make it an effective alternative to urea for soil application.
• Urea-triazone shows promise as a foliar fertilizer for enhancing crop yield.